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Preparation method of silver-plated graphene, and application of the silver-plated graphene in electric-conductive flame-retarding high-density polyethylene explosion-inhibiting material

A technology of high-density polyethylene and graphene, which is applied in the field of barrier and explosion suppression materials, can solve the problems of affecting oil quality, low elongation, poor antirust performance, etc. Good solvent performance

Active Publication Date: 2016-01-13
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, aluminum alloy explosion suppression materials also have many defects.
The internal crystallization of aluminum alloy anti-explosion material is large, which leads to the disadvantages of high brittleness, low elongation and poor anti-rust performance of the material, which is easy to break and drop slag; in serious cases, it even causes blockage of the oil circuit, resulting in failure to ignite the oil circuit, and the material is easy to burn during long-term immersion. It has an impact on the stability index (induced, actual colloid), cleanliness index (solid particles) and water-soluble acid and alkali of the oil product, and affects the quality of the oil product. The debris can block the oil meter and cause it to fail to rotate and cannot be accurate. The measurement is excellent; in addition, the edge of the aluminum foil may crack, which affects the explosion suppression performance of the material

Method used

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  • Preparation method of silver-plated graphene, and application of the silver-plated graphene in electric-conductive flame-retarding high-density polyethylene explosion-inhibiting material
  • Preparation method of silver-plated graphene, and application of the silver-plated graphene in electric-conductive flame-retarding high-density polyethylene explosion-inhibiting material
  • Preparation method of silver-plated graphene, and application of the silver-plated graphene in electric-conductive flame-retarding high-density polyethylene explosion-inhibiting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of silver-coated graphene

[0044] (1) Purification of graphene

[0045] Disperse 2.5g graphene in 100ml of HCl solution with a concentration of 6mol / L, ultrasonically disperse for 20min, then magnetically stir at 85°C for 4h, cool the solution to room temperature (25°C), centrifuge the mixture with a centrifuge and precipitate, The filter cake was repeatedly washed with deionized water until neutral, and the obtained black powder was dried in a drying oven at 60°C, that is, the purification was completed;

[0046] (2) Acidification and silanization of graphene

[0047] Get 5g of the graphene purified in step (1) and add it to 300ml of concentrated H by 98wt%. 2 SO 4 and 65wt% concentrated HNO 4 In the mixed acid solution prepared by mixing in a volume ratio of 3:1, heating, condensing and refluxing in an oil bath of 120 °C for 5 hours, then cooling to room temperature (25 °C), the mixture was centrifuged and precipitated by a centrifuge, and the filter ...

Embodiment 2

[0101] Preparation of silver-coated graphene

[0102] (1) Purification of graphene

[0103] The method is the same as in Example 1;

[0104] (2) Acidification and silanization of graphene

[0105] The method is the same as in Example 1;

[0106] (3) Preparation of graphene suspension

[0107] Take 3g of the silylated graphene obtained in step (2), add it to 200ml of dispersion liquid (the volume fraction of dimethylformamide is 40%) mixed with dimethylformamide and deionized water, and ultrasonically After treatment for 60min, the pH of the solution was adjusted to 10.5 with 7mol / L NaOH solution, and then ultrasonically treated for 75min to obtain a graphene suspension;

[0108] (4) Preparation of silver ammonia solution

[0109] 100ml of silver nitrate solution with a concentration of 22g / L was added dropwise with ammonia water with a mass fraction of 28% to clarify, and then the pH was adjusted to 10.5 with 12g / L sodium hydroxide solution to obtain silver ammonia soluti...

Embodiment 3

[0117] Preparation of silver-coated graphene

[0118] (1) Purification of graphene

[0119] The method is the same as in Example 1;

[0120] (2) Acidification and silanization of graphene

[0121] The method is the same as in Example 1;

[0122] (3) Preparation of graphene suspension

[0123] Take 3g of the silylated graphene obtained in step (2), add it to 200ml of dispersion liquid (the volume fraction of dimethylformamide is 42%) mixed with dimethylformamide and deionized water, ultrasonically After treatment for 60min, the pH of the solution was adjusted to 10.5 with 7mol / L NaOH solution, and then ultrasonically treated for 75min to obtain a graphene suspension;

[0124] (4) Preparation of silver ammonia solution

[0125] 100ml of silver nitrate solution with a concentration of 22g / L was added dropwise to 28% ammonia water to clarify, and then 100g / L of sodium tartrate solution was used to adjust the pH to 10.5 to obtain silver ammonia solution;

[0126] (5) Electrol...

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Abstract

The invention belongs to the technical field of flame-retarding and explosion-inhibiting materials and especially relates to a preparation method of an electric-conductive flame-retarding high-density polyethylene / silver-plated graphene composite explosion-inhibiting material. The preparation method includes the steps of purifying graphene, acidifying and silanizing the graphene, preparing a graphene suspension liquid, preparing a silver ammonia solution, and chemically plating silver onto graphene to obtain the graphene of which the surface is chemically plated with silver, and finally performing co-extrusion to the silver-plated graphene with a high-molecular material to obtain the electric-conductive flame-retarding polymer / silver-plated graphene composite explosion-inhibiting material. The material is excellent in electric-conductivity, chemical property, flame-retarding performance and explosion-inhibiting performance. The material overcomes the defects in explosion-inhibiting materials in the prior art.

Description

technical field [0001] The invention belongs to the technical field of barrier and explosion-suppression materials, in particular to a preparation process of a conductive flame-retardant high-density polyethylene / silver-plated graphene composite explosion-suppression material. Background technique [0002] Over the years, people have been afraid of flammable and explosive products such as gasoline, liquefied gas, natural gas, propane, methane, etc., and can only passively prevent, but despite this, due to some unforeseen and sudden reasons (such as static electricity, welding, Shooting, collision, wrong operation, etc.), resulting in explosions caused by accidents in chemical plants, oil refineries, gas stations, automobiles, oil trucks, oil depots, oil storage tanks, etc., causing irreparable huge losses to the country and people's property. [0003] After the explosion suppression material is placed in the container, because the meshes in the explosion suppression material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/06C08K9/06C08K9/10C08K5/5313C08K5/3492C08K5/14C08K5/03C08K3/22C08K3/38
CPCC08K3/22C08K3/2279C08K3/38C08K5/03C08K5/14C08K5/34926C08K5/34928C08K5/5313C08K9/06C08K9/10C08K13/06C08K2003/322C08K2003/387C08L2201/02C08L23/06
Inventor 陶国良夏艳平
Owner CHANGZHOU UNIV
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